diff --git a/.github/workflows/ci-macos.yml b/.github/workflows/ci-macos.yml
index 539ec7c..341e7a5 100644
--- a/.github/workflows/ci-macos.yml
+++ b/.github/workflows/ci-macos.yml
@@ -4,7 +4,7 @@ name: CI MacOS
 on: [push, pull_request]
 jobs:
   build:
-    runs-on: macos-latest
+    runs-on: macos-11
     
     strategy:
       matrix: